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Finding the Fourth Proportional to 715.32, 984.84 and 623.28

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Solution

The fourth proportional to 715.32, 984.84 and 623.28 is: 858.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.32 : 984.84 = 623.28 : x
  2. Step 2: Convert to fraction form
    715.32/984.84 = 623.28/x
  3. Step 3: Cross multiply
    715.32x = 984.84 × 623.28
  4. Step 4: Simplify right side
    715.32x = 613,831.08
  5. Step 5: Solve for x
    x = 613,831.08/715.32
  6. Step 6: Final answer
    x = 858.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.